Prenatal stress and neurodevelopmental disorders: neuroanatomical and psychiatric outcomes

Аннотация

Prenatal stress has been increasingly recognized as a significant factor influencing fetal brain development, leading to long-term neuroanatomical and psychiatric consequences. This literature review synthesizes current research on the impact of maternal stress during pregnancy on offspring neurodevelopment, focusing on structural brain abnormalities and associated psychiatric disorders. Evidence suggests that prenatal stress disrupts neurogenesis, synaptic plasticity, and hypothalamic- pituitary-adrenal (HPA) axis function, increasing susceptibility to conditions such as autism spectrum disorder (ASD), attention-deficit/hyperactivity disorder (ADHD), schizophrenia, and mood disorders. Understanding these mechanisms is crucial for developing early intervention strategies to mitigate adverse outcomes. Keywords: Prenatal stress, neurodevelopmental disorders, fetal brain development, neuroanatomical abnormalities, psychiatric outcomes. Introduction: The influence of prenatal stress on fetal The American Journal of Medical Sciences and Pharmaceutical Research 20 https://www.theamericanjournals.com/index.php/tajmspr The American Journal of Medical Sciences and Pharmaceutical Research neurodevelopment represents a critical area of alterations in the HPA axis, neurogenesis, synaptic research at the intersection of developmental plasticity, and neural connectivity. neuroscience, psychiatry, and public health. Growing This review seeks to bridge gaps in existing research and evidence suggests that maternal psychological and provide a foundation for future studies aimed at physiological stressors during pregnancy can have far- reducing the long-term impact of prenatal stress on reaching consequences on offspring brain brain health and mental well-being. development, increasing vulnerability to METHODS neurodevelopmental and psychiatric disorders. This phenomenon has been investigated through multiple This literature review was conducted through a lenses, ranging from molecular and epigenetic systematic examination of peer-reviewed studies from mechanisms to large-scale epidemiological studies. major scientific databases, including PubMed, Google Scholar, ScienceDirect, and PsycINFO, using keywords Key contributions to this field have come from such as prenatal stress, neurodevelopmental disorders, researchers exploring stress-mediated alterations in fetal brain development, HPA axis dysfunction, and the hypothalamic-pituitary-adrenal (HPA) axis (Glover, psychiatric outcomes. The inclusion criteria prioritized 2011), glucocorticoid-induced disruptions in original research articles, meta-analyses, and hippocampal plasticity (Lupien et al., 2009), and stress- longitudinal studies published between 2000 and 2024, related hyperactivation of the amygdala (Buss et al., focusing on both human and animal models to ensure 2012). Further studies have examined the impact on comprehensive coverage of neurobiological executive function through prefrontal cortex mechanisms and clinical implications. Studies were dysfunction (Arnsten, 2009) and impaired neural selected based on their relevance to structural brain connectivity due to white matter abnormalities (Qiu et abnormalities, behavioral outcomes, and molecular al., 2015). Additionally, clinical research has linked pathways linking maternal stress to offspring prenatal stress to an elevated risk of neurodevelopment. Data extraction included neurodevelopmental disorders such as autism experimental methodologies (e.g., MRI/fMRI, diffusion spectrum disorder (Beversdorf et al., 2018) and tensor imaging (DTI), cortisol assays, epigenetic schizophrenia (Fatemi & Folsom, 2009), as well as analyses, and behavioral assessments), as well as mood and anxiety disorders later in life. statistical approaches used to establish correlations Understanding these mechanisms is not only essential between prenatal stress exposure and neuropsychiatric for advancing neurodevelopmental science but also for disorders. Animal studies involving rodent and non- shaping early intervention policies and maternal human primate models were also analyzed to elucidate healthcare strategies. Given the increasing prevalence mechanistic insights into glucocorticoid signaling, of stress-related conditions in modern society, this synaptic plasticity, and neuroinflammation. To minimize research has significant implications for preventing bias, findings were cross-referenced across multiple long-term cognitive and psychiatric impairments in studies, and conflicting evidence was critically evaluated future generations. to present a balanced synthesis of current knowledge. Purpose of the Research The review adheres to PRISMA guidelines where applicable, ensuring methodological rigor in the The primary objective of this literature review is to selection and interpretation of published research. synthesize current scientific knowledge on the neuroanatomical and psychiatric consequences of RESULTS prenatal stress, with a pa